I have a 406, which just bit it last week. We haven't torn it down yet to see the damage. But, the general consensus is that I broke a skirt on #4. The guy who built it left that cylinder a little loose. Hopefully there isn't too much damage.

The motor has 200cc Sportsman II heads, 72cc & 2.02/1.60 valves, Forged flat tops, 1.6:1 rockers, MSD with HEI, Edelbrock Air Gap intake, RV cam, with 770 Holley, and good fuel delivery.

I need to know some good combos if I have to go +40 or even +60. Also what size would it be if I had to go to +60.

Any info would be great, and I already checked Ryan's page, not any combos close to what I have.

Thanks